The structural design principle of fire ball valve, the role of fire damper, and what is fire damper

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Chaoda, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Fire damper is used in the isolation position of the fire protection zone of the building to cut off the pipes (mostly air ducts) passing through different fire zones, so as to prevent the fire hazards in one zone from spreading to other fire zones through the pipes. The principle is that the valve is equipped with a temperature sensing piece (fusible sheet), when the temperature is reached, the fusible sheet melts, and the valve mechanical device drives the valve blade to close.

Fire damper, normally open, 70 or 280 closed, generally installed in the air duct through the firewall and structural deformation joint, disaster control function, can be set to output signal, temperature more than 70 or 280 when the valve is closed, linkage fan closed.

Product principle. Installed in the air duct system of the first air conditioner, the working principle is to use the temperature control of the extremely fusible alloy installed on the valve, the use of gravity and the action of the spring mechanism, when the fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, or makes the memory alloy deform so that the valve is automatically closed, which is used for the occasion when the air duct and the fire partition penetrate.

Product Classification. When the gas temperature in the pipeline reaches 70, the fusible piece is fused, and the valve is automatically closed under the action of torsion spring force, which can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time, and play the role of smoke and fire resistance. When the valve is closed, a closing signal is output.

Smoke and fire control valve, normally open, 70 degrees closed, the same as 1, but no more than one telecommunication signal input, can be remotely controlled and closed by the control room, generally used in the usual air supply, fire air supply in the common air duct system, fire can control the closure of the room that does not need to be made up in case of fire;

Normally open smoke exhaust fire damper, 280 degree fuse closing, normally open, output telecommunication signal, this is similar to 1, but the fuse temperature is different, generally used in the fire smoke exhaust pipe through the firewall, the flue gas temperature exceeds 280 degrees when the automatic fuse is closed, can be linked to close the smoke exhaust fan.

The smoke exhaust valve is installed on the pipeline of the smoke exhaust system, which is generally closed at ordinary times, and opens manually or electrically in case of fire to play the role of smoke exhaust. When the flue gas temperature in the smoke exhaust pipe reaches 280, it is closed, and it can meet the requirements of fire resistance stability and fire integrity within a certain period of time, and plays the role of smoke exhaust.

Normally closed smoke exhaust fire damper (normally closed, telecommunication signal open, 280 degree fuse closing, or manual closing) is generally used in the smoke exhaust system, which can be installed at the suction inlet of the smoke exhaust fan, which is controlled and opened by the control room in case of fire, and the smoke exhaust fan can also be closed interlockedly when closed.

Smoke exhaust valve, with the above 3, each unit is called different, some are called smoke exhaust valve according to its operating temperature, and some are called fire damper according to its use nature, but for the equipment side, it is only the kind of fuse metal that replaces the ordinary fire damper with a 280-degree fuse.

3.Automatic smoke and fire damper (for subway engineering) The fire prevention and smoke exhaust valve of the ventilation and air conditioning system of the underground railway has the function of linkage control with automatic fire alarm equipment and gas fire extinguishing system. Each automatic smoke and fire damper has two independent electric control signals, which are monitored by EMCS and air elimination system, and the control signals are DC24V 10% signals.

Each automatic smoke and fire damper has six independent feedback signals (three open in place and three closed in place), and the feedback signals are normally open passive contact signals.

If you have installed the necessary smoke exhaust valve on the pipeline, you can use an ordinary single-layer louver tuyere; Otherwise, it is necessary to use a plate smoke exhaust port, which also has a mechanism for smoke exhaust fire damper.

There are three types of fire dampers.

One is a 70° fire damper.

One is a 280° fire damper.

There is also a less commonly used 150° fire damper.

No matter how many degrees of fire damper, its working state is to be installed on the ventilation duct or fire pipe; Usually in the normally open state, when the temperature is reached, the controller fuses, automatically closes, blocking the flame or heat wave; Prevent the spread of flames along ventilation ducts;

70° fire damper is, when the temperature reaches 70 °, it will automatically close when the temperature reaches 280 °, 280 ° fire damper will automatically close when the temperature reaches 280 °, and it will automatically close when the temperature reaches 150 °, not that it can only block the temperature of 70 °;

The role of fire damper, fire damper manufacturers, the working principle of fire damper.

How ball valves work.

The opening and closing part of the ball valve is a ball with a circular channel, which rotates around the axis perpendicular to the channel, and the ball rotates with the valve stem to achieve the purpose of opening and closing the channel. The ball valve only needs to be rotated 90 degrees and the torque is small to close tightly. According to the needs of working conditions, different driving devices can be assembled to form a variety of ball valves with different control methods, such as electric ball valves, pneumatic ball valves, hydraulic ball valves, etc.

Ball valve structure diagram.

When the ball valve rotates 90 degrees, it should be spherical at the inlet and outlet, so as to close the valve and cut off the flow of the medium.

When the ball valve rotates 90 degrees, the ball port should be presented at the inlet and outlet, so as to open the flow, and there is basically no flow resistance.

The working principle of the ball valve is that the closure (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control.

In China, ball valves are widely used in petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries, and occupy a pivotal position in the national economy. It has an action of 90 degrees of rotation, and the body is a sphere, with circular through-holes or channels through its axis.

The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a small torque to close tightly. Ball valves are most suitable for switching, shut-off valves, V-type ball valves. In addition to the parameters of the pipeline, special attention should be paid to the environmental conditions of its use, because the electric device in the electric valve is an electromechanical equipment, and its use state is greatly affected by its use environment.

Under normal conditions, special attention should be paid to the use of electric ball valves and butterfly valves in the following environments.

The working principle of the orbital hard seal ball valve: the principle of the cam makes the valve ball detach from the sealing surface of the valve seat during rotation, and then push the valve ball to the valve seat to achieve sealing after rotation in place. When the valve is in the fully open position, the instantaneous hand turns the handwheel, and with the stem nut and thrust bearing, the stem begins to descend and drive the ball to start rotating.

Connected to the rotating handwheel, the precision spiral curve groove track on the valve stem interacts with the guide pin embedded in it, and drives the ball to rotate in a clockwise direction with the valve stem. When the valve is about to close, the stem drives the ball to rotate 90° without friction against the seat sealing surface.

Explosion-proof air conditioners can be divided into single cooling and cold and warm according to their performance, and can be divided into three types according to their structural form: explosion-proof window machine, split explosion-proof hanging air conditioner, and split explosion-proof cabinet air conditioner;

Explosion-proof air conditioner is based on high-quality brand-name air conditioner, in accordance with the requirements of GB 3836 series standard explosion-proof design, using special processing technology and manufacturing methods for explosion-proof processing;

Air conditioning brands can be selected according to user requirements, such as Midea, Gree, Mitsubishi, etc.;

The explosion-proof air conditioning pipeline connection is the same as that of ordinary air conditioning, and the electrical connection must be according to the requirements of the explosion-proof electrical installation process, and the power supply must be introduced into the explosion-proof control box first, and then introduced into the indoor unit and outdoor unit from the explosion-proof control box respectively;

The explosion-proof control box has been equipped with a power switch;

According to the user's requirements, the explosion-proof treatment of special air-conditioning equipment on site can be carried out. For example: large-scale chillers, refrigeration units, first-class air-conditioning equipment and special installation forms of air-conditioning equipment for explosion-proof treatment, we will design and manufacture the plan, submit it to the user for check, if necessary, according to the user's requirements, apply for the national explosion-proof testing center to conduct product explosion-proof performance testing on site;

All explosion-proof air conditioners are supplied with a full set of product technical information and installation and use instructions when leaving the factory, and users must install and use them in strict accordance with the requirements of the manual;

Compressor: Hitachi, Toshiba, Mitsubishi, Daikin and other well-known brands, integrated design, evaporator self-cleaning function, temperature digital digital display, large diameter, unequal distance fan blades, large air volume, low noise.

The product has compact structure, beautiful appearance, easy installation and maintenance;

Routing of steel pipes or cables.

GB Electrical Equipment for Gas Atmospheres Part 1: General Requirements

GB "Electrical Equipment for Gaseous Atmospheres Part 2: Flameproof Type "D".

GB "Electrical Equipment for Gas Atmospheres Part 3: Increased Safety Type "E".

GB "Electrical Equipment for Gas Atmospheres Part 4: Intrinsically Safe Type "I".

GB "Electrical Equipment for Gas Atmospheres Part 9: Cast Type "M".

The surface of the product adopts the highest surface temperature limit protection technology and comprehensive anti-static technology, as well as a variety of safety protection technologies;

Wide voltage design, suitable for unstable power supply in the field, voltage: 220V 50Hz, 220V 60Hz, 110V 50Hz;

The role of fire damper, fire damper manufacturers, the working principle of fire damper.

First, the working principle of fire damper.

The fire damper is based on the adjustment, and the temperature control device is added. It is usually open, and when a fire occurs, the temperature fuse automatically closes the valve quickly, and manually pulls the valve to open. Fire dampers are usually installed on the pipes of ventilation and air conditioning systems with fire protection requirements.

Second, the role of fire damper.

Fire damper is a fusible alloy temperature control, using gravity and spring mechanism to close the valve form. There are also new products that use memory alloys to generate deformation to close the valve. When the flue gas temperature reaches 280, the people have been basically evacuated, and the smoke exhaust has no practical significance, and the smoke has been on fire at this time, and the valve is automatically closed to avoid the spread of fire.

The role of fire damper, fire damper manufacturers, the working principle of fire damper.

The fire damper is installed in the air duct system of the air conditioner, and the working principle is the temperature control of the extremely fusible alloy, and the valve is closed by the action of gravity and the action of the spring mechanism. When a fire occurs, the flame invades the air duct, and the fusible alloy on the valve is melted at high temperature, or the memory alloy is deformed to make the valve close automatically, which is used for the occasion when the air duct and the fire partition penetrate.

1. The main control parameters of the fire damper are the specifications;

2. The fire damper is suitable for ventilation and air conditioning systems, except for the fire damper for the kitchen exhaust fume system of public buildings, the operating temperature is 150, and the operating temperature of the fire damper for the general ventilation and air conditioning system is 70;

3. When selecting the valve, attention should be paid to the function of the valve, such as normally open or normally closed, automatic closing and opening, manual closing and opening, manual reset, signal output, remote control and other requirements;

4. If the valve is linked with the fan, it should be equipped with a double micro switch device.

5. The valve body blades should be steel plates, with a thickness of 2 6mm, the valve body should be made of non-combustible materials, and the rotating parts should be made of corrosion-resistant metal materials, and rotate flexibly. The thickness of the valve housing must not be less than 2mm. Meltable parts should meet the approved standards of the fire department.

The role of fire damper, fire damper manufacturers, the working principle of fire damper.